CN210469080U - Single-cage copper bar rotor for flame-proof type variable-frequency speed-regulating asynchronous motor - Google Patents
Single-cage copper bar rotor for flame-proof type variable-frequency speed-regulating asynchronous motor Download PDFInfo
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- CN210469080U CN210469080U CN201921396086.9U CN201921396086U CN210469080U CN 210469080 U CN210469080 U CN 210469080U CN 201921396086 U CN201921396086 U CN 201921396086U CN 210469080 U CN210469080 U CN 210469080U
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 18
- 239000010949 copper Substances 0.000 title claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 49
- 238000004080 punching Methods 0.000 claims abstract description 13
- 238000009423 ventilation Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000003466 welding Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
A single-cage copper bar rotor for an explosion-proof variable-frequency speed-regulating asynchronous motor comprises a first rotor pressing ring, a second rotor pressing ring, a first balance ring, a second balance ring, a front end ring, a rear end ring, cage bars, a first balance block, a second balance block, a front check ring, a rear check ring and rotor punching sheets, wherein the first rotor pressing ring, the first balance ring, the second rotor pressing ring and the second balance ring are fixedly connected to limit the distance between the inner side of the end ring and the outer side of the rotor pressing ring, the front end ring and the rear end ring are respectively sleeved at two ends of the cage bars, the first balance block is assembled on the first balance ring, the second balance block is assembled on the second balance ring, a rotor core is formed by the rotor punching sheets, and a rotor ventilation channel is formed in the rotor core. The utility model has the advantages of compact and reasonable structure, the simple operation can not produce deformation and incline after cage strip and front end links and the welding of rear end links, and the motor can not take place end links and cage strip welding department breaking occur or open welding phenomenon in low frequency low-speed, big torque and overload operation yet.
Description
The technical field is as follows:
the utility model relates to a motor rotor technical field, in particular to flame-proof type variable frequency speed governing single cage copper bar rotor for asynchronous motor, the flame-proof type variable frequency speed governing single cage copper bar rotor for three-phase asynchronous motor promptly.
Background art:
along with the rapid increase of the level and the capacity of coal mine equipment, the power of a coal mining machine reaches thousands of kilowatts, the production efficiency and the automation capacity are improved, a scraper conveyor on a mining working face matched with the coal mining machine is gradually increased along with the power, and a power driving system of the scraper conveyor generally adopts three modes of a controllable hydraulic coupler system such as a double-speed motor, a CST (continuous casting machine) and the like, a frequency converter drives a variable-frequency speed-regulating motor and the like at present.
At present, a double-speed motor driving system is adopted for the mining scraper conveyor in China, and due to the defects, the motor is unstable in starting, is greatly impacted mechanically and electrically during starting, has multiple fault points, and is poor in safety and reliability. Therefore, the mode of adopting the frequency converter to drive the variable frequency motor is adopted by a plurality of local mines. The application technology of the frequency converter driving variable frequency motor on the scraper conveyor realizes dynamic balance of the head and the tail of the scraper conveyor through detection of the motor current of the scraper conveyor, and reduces the damage probability of a motor, a chain and a scraper. The frequency converter has the functions of low-speed heavy-load starting, chain breakage protection, low-speed maintenance and the like, and has the characteristics of safety, reliability, high stability and the like of unit starting and running.
According to the requirement of the industrial standard of the variable frequency speed control motor on the performance of the motor, the variable frequency motor reduces the power supply efficiency at low speed, and can adjust the maximum torque to the starting point to obtain good starting performance, so that the starting performance is not required to be specially considered when the variable frequency motor is designed, and the rotor groove is not required to be designed into a deep groove. The variable frequency motor can have multiple operation modes corresponding to multiple different slip frequencies at each operation point by adjusting voltage and frequency. Therefore, the optimal slip frequency can be always found, and the efficiency and the power factor of the motor are high in a wide speed regulation range. Therefore, the power factor and the efficiency of the variable frequency motor can be designed to be high, and the power density can be further improved.
The invention content is as follows:
in view of this, it is necessary to provide a single-cage copper bar rotor for an explosion-proof variable-frequency speed-regulating asynchronous motor.
A single-cage copper bar rotor for an explosion-proof variable-frequency speed-regulating asynchronous motor comprises a first rotor pressing ring, a second rotor pressing ring, a first balance ring, a second balance ring, a front end ring, a rear end ring, cage bars, a first balance block, a second balance block, a front check ring, a rear check ring and rotor punching sheets, wherein the first rotor pressing ring and the first balance ring are assembled at the front end of a motor rotating shaft, the second rotor pressing ring and the second balance ring are assembled at the rear end of the motor rotating shaft, the first rotor pressing ring, the first balance ring, the second rotor pressing ring and the second balance ring are fixedly connected to limit the distance between the inner side of the end ring and the outer side of the rotor pressing ring, the front end ring and the rear end ring are respectively sleeved at two ends of the cage bars, the first balance block is assembled on the first balance ring, the second balance block is assembled on the second balance ring, a rotor core is formed by the rotor, a rotor ventilation channel is formed on the rotor core, the front end of the first balance ring is fixed by the front check ring, the rear check ring is fixed at the rear end of the second balance ring.
Preferably, the first balance ring and the first rotor pressing ring are fixed through a first opening screw, and the second balance ring and the second rotor pressing ring are fixed through a second opening screw.
Preferably, the front end of the first balance ring is fixed by a front retaining ring, the rear end of the second balance ring is provided with an inner fan, the front end face of the inner fan is aligned with the rear end face of the second balance ring, and the inner fan is fixedly installed by matching a fan key and the retaining ring.
Preferably, the cage bars, the front end ring, the rear end ring, the first rotor pressing ring, the second rotor pressing ring and the rotor iron core are coaxially mounted with the motor rotating shaft.
Preferably, the motor rotating shaft is provided with a key slot, and a rotor key is assembled in the key slot.
Preferably, the rotor punching sheet is arranged in a motor rotating shaft, and then is respectively arranged in the first rotor pressing ring and the second rotor pressing ring, and then the clamping ring is arranged for fixing.
The utility model discloses a first rotor clamping ring, second rotor clamping ring, first gimbal ring and second gimbal ring are connected and have been injectd after fixed distance between the front end links, the rear end links inboard and the first rotor clamping ring and the second rotor clamping ring outside, and the effectual front end links, rear end links and cage strip welding of having guaranteed are difficult for producing the inclined plane after accomplishing. In order to meet the performance requirement of the variable frequency motor, the rotor core is designed into an inner ventilation channel, and when the motor is in operation, heat generated by the stator winding, the end ring and the cage bars and heat generated by the rotor core are extracted by an inner fan. The efficiency and the power factor of the motor are effectively improved by adopting a single cage structure. And under the condition that the power factor meets the standard requirement, the air gap value is properly increased. The heat extracted through the rotor ventilation channel and the air gap between the stator and the rotor form internal circulation, so that the heat generated by the inner cavity of the stator of the motor is uniformly distributed, and the quality accident caused by local overheating of the inner cavity of the motor cannot be caused.
The utility model has the advantages of compact and reasonable structure, the simple operation for the L size of front end links, rear end links and first rotor clamping ring and second rotor clamping ring is guaranteed easily, can not produce deformation and incline after cage strip and front end links and the welding of rear end links, and the motor can not take place also that end links and cage strip welding department break off or open welding phenomenon in low frequency low-speed, big torque and overload operation. The welding quality of the rotor is guaranteed, and therefore the service life of the motor is prolonged.
Description of the drawings:
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a partial section structure of a single-cage copper bar rotor for an explosion-proof variable-frequency speed-regulating asynchronous motor.
In the figure: the rotor comprises a first rotor pressing ring 1, a second rotor pressing ring 2, a first balance ring 3, a second balance ring 4, a front end ring 5, a rear end ring 6, a cage bar 7, a first balance block 8, a second balance block 9, a front retaining ring 10, a rear retaining ring 11, a rotor iron core 12, a motor rotating shaft 13, a first opening screw 14, a second opening screw 15, an inner fan 16, a fan key 17, a rotor key 18 and a clamping ring 19.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", etc. are used only for distinguishing between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front" and "rear" and the like are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
The utility model provides a following specific embodiment.
Referring to fig. 1, the single-cage copper bar rotor for the flameproof variable frequency speed regulation asynchronous motor comprises a first rotor clamping ring 1, a second rotor clamping ring 2, a first balance ring 3, a second balance ring 4, a front end ring 5, a rear end ring 6, cage bars 7, a first balance block 8, a second balance block 9, a front retaining ring 10, a rear retaining ring 11 and a rotor sheet, wherein the first rotor clamping ring 1 and the first balance ring 4 are assembled at the front end of a motor rotating shaft 13, the second rotor clamping ring 2 and the second balance ring 4 are assembled at the rear end of the motor rotating shaft 13, the first rotor clamping ring 1, the first balance ring 3, the second rotor clamping ring 2 and the second balance ring 4 are fixedly connected to limit the distance between the inner sides of the front end ring 5 and the rear end ring 6 and the outer sides of the first rotor clamping ring 1 and the second rotor clamping ring 2, the front end ring 5 and the rear end ring 6 are respectively sleeved at the two ends of the cage bars 7, the first balance block 8 is assembled on the first balance ring 3, the second balance block 9 is assembled on the second balance ring 4, the rotor punching sheets form a rotor core 12, and a rotor ventilation duct is formed on the rotor core 12. The front end of the first balance ring 3 is fixed by a front check ring 10, and the rear check ring 11 is fixed at the rear end of the second balance ring 9.
The first balance ring 3 and the first rotor pressing ring 1 are fixed through a first split screw 14, and the second balance ring 4 and the second rotor pressing ring 2 are fixed through a second split screw 15.
The front end of the first balance ring 3 is fixed by a front retainer ring 10, the rear end of the second balance ring 9 is provided with an inner fan 16, the front end surface of the inner fan 16 is aligned with the rear end surface of the second balance ring 9, and the inner fan 16 is fixedly installed by matching a fan key 17 with a rear retainer ring 11.
The cage bars 7, the front end ring 5, the rear end ring 6, the first rotor pressing ring 1, the second rotor pressing ring 2 and the rotor iron core 12 are coaxially arranged with the motor rotating shaft 13.
The motor shaft 13 is provided with a key slot, and a rotor key 18 is arranged in the key slot.
The rotor punching sheet is arranged in a motor rotating shaft 13, then respectively arranged in a first rotor pressing ring 1 and a second rotor pressing ring 2, and then a clamping ring 19 is arranged for fixing.
The assembly method of the utility model is as follows: a rotating shaft key groove is formed in a motor rotating shaft 13, a rotor key 18 is arranged in the rotating shaft key groove, the motor rotating shaft 13 is vertically fixed and is arranged in a first rotor pressing ring 1, then rotor punching sheets are arranged in the motor rotating shaft 13 according to the consistent direction of the number of the punching sheets with the designed length, then the rotor punching sheets are shifted to a second rotor pressing ring 2, the rotor punching sheets are pressed according to the pressure value specified by the technical law, a clamping ring 19 is installed for fixing, and the opening of the clamping ring 19 is reinforced through spot welding. The processed cage bars 7 are embedded into the rotor core slots, and the two ends of the processed cage bars extend out of the outer sides of the first rotor pressing ring 1 and the second rotor pressing ring 2 to be the same in size. And respectively installing the front end and the rear end of the cage bar 7 into end ring grooves of the front end ring 5 and the rear end ring 6, and adjusting the sizes of L at the two ends to ensure that the sizes of L are basically equal, wherein the size of L is the size specified by the process. The first balance ring 3 and the second balance ring 4 at two ends are installed, the first split screws 14 and the second split screws 15 are screwed down respectively, the sizes of the two ends L are calibrated again by the front check ring 10 and the rear check ring 11 after the front check ring and the rear check ring are installed, the size requirements must be met, then intermediate frequency welding is carried out, and the rotor assembly is manufactured. After the cage bars 7 are welded with the front end ring 5 and the rear end ring 6, the cage bars are processed according to the drawing size and the technical requirements, then a dynamic balance test is carried out, unbalance is added according to the requirement of allowable unbalance moment values, the unbalance is a first balance weight 8 and a second balance weight 9, and the first balance weight 8 and the second balance weight 9 are added and fixed through spot welding. And then assembling a fan key 17 and an inner fan 16 and fixing by adopting a rear retainer ring 11 to complete the single-cage copper bar rotor structure.
The utility model has the advantages of compact and reasonable structure, the simple operation for front end ring 5, rear end ring 6 guarantee easily with the L size of first rotor clamping ring 1 and second rotor clamping ring 2, can not produce deformation and incline after cage strip 7 and front end ring 5 and the 6 welding of rear end ring, and the motor can not take place front end ring 5, rear end ring 6 and the 7 welding departments of cage strip and break or open welding the phenomenon in low frequency low-speed, big torque and overload operation yet. The welding quality of the rotor is guaranteed, and therefore the service life of the motor is prolonged.
The motor rotor is convenient for placing and fixing the balance blocks after a dynamic balance test, the phenomenon that the welding positions of the front end ring 5, the rear end ring 6 and the cage bars 7 are broken or welded under the action of thermal stress, electromagnetic force and centrifugal force when the motor runs for a long time is reduced, and the mechanical strength is further improved. The L-shaped size of the front end ring 5 and the rear end ring 6 and the first rotor pressing ring 1 and the second rotor pressing ring 2 is effectively guaranteed, the installation and the fixing operation are simple and convenient, the welding quality of the single-cage copper bar rotor is improved, and the motor performance and the use requirements of users are met.
After the first rotor pressing ring 1, the second rotor pressing ring 2, the first balance ring 3 and the second balance ring 4 are fixedly connected, the distance between the inner sides of the front end ring 5 and the rear end ring 6 and the outer sides of the first rotor pressing ring 1 and the second rotor pressing ring 2 is limited, and the inclined surfaces are not easy to generate after the welding of the front end ring 5 and the rear end ring 6 and the cage bars 7 is finished effectively. In order to meet the performance requirements of the variable frequency motor, the rotor core 12 is designed as an internal ventilation channel, and when the motor is in operation, heat generated by the stator winding, the end ring and the cage bars 7 and heat generated by the rotor core 12 per se are extracted by an internal fan 16. The efficiency and the power factor of the motor are effectively improved by adopting a single cage structure. And under the condition that the power factor meets the standard requirement, the air gap value is properly increased. The heat extracted through the rotor ventilation channel and the air gap between the stator and the rotor form internal circulation, so that the heat generated by the inner cavity of the stator of the motor is uniformly distributed, and the quality accident caused by local overheating of the inner cavity of the motor cannot be caused.
The utility model discloses certain clearance is left on first gimbal 3 and second gimbal 4 and first rotor clamping ring 1 and the 2 tops of second rotor clamping ring at both ends, and the installation is not in place and influence the L size at both ends when preventing to install first gimbal 3 and second gimbal 4, and the great stainless steel 304 material of resistivity is used to first gimbal 3 and second gimbal 4 ring, can not influence its motor operating performance. In conclusion, the assembly and welding of the rotor assembly are completed, then the rotor assembly is processed according to the drawing size, other procedures are completed according to the drawing technical requirements and the process specifications, and the inner fan key 17 and the inner fan 16 are installed in the motor rotating shaft 13 and are fixed by the front retaining ring 10 and the rear retaining ring 11 after the inspection and verification are passed. The left end of the inner fan 16 is aligned with the end face of the first balance ring 3, and the first balance ring 3, the rotor iron core 12, the second balance ring 4 and the inner fan 16 are combined to form a rotor inner air duct. The heat generated by the rotor when the motor operates is extracted by the inner fan, and the inner air channel forms inner circulation with the air gap between the stator and the rotor, so that the heat of the inner cavity of the motor is uniform, the insulation accelerated aging of the winding end part caused by the long-term overheating of the winding end part of the stator is effectively prevented, and the service life of the motor is prolonged.
Claims (6)
1. The utility model provides a flame-proof type becomes speed governing single cage copper bar rotor for asynchronous motor which characterized in that: the single-cage copper bar rotor for the explosion-proof variable-frequency speed-regulating asynchronous motor comprises a first rotor pressing ring, a second rotor pressing ring, a first balance ring, a second balance ring, a front end ring, a rear end ring, cage bars, a first balance block, a second balance block, a front check ring, a rear check ring and rotor punching sheets, wherein the first rotor pressing ring and the first balance ring are assembled at the front end of a motor rotating shaft, the second rotor pressing ring and the second balance ring are assembled at the rear end of the motor rotating shaft, the first rotor pressing ring, the first balance ring, the second rotor pressing ring and the second balance ring are fixedly connected to limit the distance between the inner side of the end ring and the outer side of the rotor pressing ring, the front end ring and the rear end ring are respectively sleeved at two ends of the cage bars, the first balance block is assembled on the first balance ring, the second balance block is assembled on the second balance ring, the rotor punching sheets form a rotor core, a rotor ventilation channel is arranged on the rotor core, the front end of the first balance ring is fixed by the front check ring, the rear check ring is fixed at the rear end of the second balance ring.
2. The single-cage copper bar rotor for the flame-proof type variable frequency speed regulation asynchronous motor according to claim 1, characterized in that: the first balance ring and the first rotor pressing ring are fixed through a first opening screw, and the second balance ring and the second rotor pressing ring are fixed through a second opening screw.
3. The single-cage copper bar rotor for the flame-proof type variable frequency speed regulation asynchronous motor according to claim 2, characterized in that: the front end of the first balance ring is fixed by a front retaining ring, the rear end of the second balance ring is provided with an inner fan, the front end face of the inner fan is aligned with the rear end face of the second balance ring, and the inner fan is fixedly installed by matching a fan key and the retaining ring.
4. The single-cage copper bar rotor for the flame-proof type variable-frequency speed-regulating asynchronous motor according to any one of claims 1 to 3, characterized in that: the cage bars, the front end ring, the rear end ring, the first rotor pressing ring, the second rotor pressing ring and the rotor iron core are coaxially arranged with the motor rotating shaft.
5. The single-cage copper bar rotor for the flame-proof type variable frequency speed regulation asynchronous motor according to claim 4, characterized in that: the motor rotating shaft is provided with a key groove, and a rotor key is assembled in the key groove.
6. The single-cage copper bar rotor for the flame-proof type variable frequency speed regulation asynchronous motor according to claim 5, characterized in that: the rotor punching sheet is arranged in a motor rotating shaft, and then is respectively arranged in a first rotor pressing ring and a second rotor pressing ring, and then a clamping ring is arranged for fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921396086.9U CN210469080U (en) | 2019-08-26 | 2019-08-26 | Single-cage copper bar rotor for flame-proof type variable-frequency speed-regulating asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921396086.9U CN210469080U (en) | 2019-08-26 | 2019-08-26 | Single-cage copper bar rotor for flame-proof type variable-frequency speed-regulating asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210469080U true CN210469080U (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921396086.9U Withdrawn - After Issue CN210469080U (en) | 2019-08-26 | 2019-08-26 | Single-cage copper bar rotor for flame-proof type variable-frequency speed-regulating asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210469080U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445333A (en) * | 2019-08-26 | 2019-11-12 | 宁夏西北骏马电机制造股份有限公司 | Explosion-proof frequency conversion speed-regulating asynchronous motor single cage copper bar rotor |
| CN115765292A (en) * | 2022-11-23 | 2023-03-07 | 卧龙电气南阳防爆集团股份有限公司 | High-speed motor shielding type rotor balancing device and method and high-speed motor |
-
2019
- 2019-08-26 CN CN201921396086.9U patent/CN210469080U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445333A (en) * | 2019-08-26 | 2019-11-12 | 宁夏西北骏马电机制造股份有限公司 | Explosion-proof frequency conversion speed-regulating asynchronous motor single cage copper bar rotor |
| CN110445333B (en) * | 2019-08-26 | 2024-07-02 | 宁夏西北骏马电机制造股份有限公司 | Single-cage copper bar rotor for explosion-proof variable-frequency speed-regulating asynchronous motor |
| CN115765292A (en) * | 2022-11-23 | 2023-03-07 | 卧龙电气南阳防爆集团股份有限公司 | High-speed motor shielding type rotor balancing device and method and high-speed motor |
| CN115765292B (en) * | 2022-11-23 | 2023-10-27 | 卧龙电气南阳防爆集团股份有限公司 | High-speed motor shielding type rotor balancing device and method and high-speed motor |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200505 Effective date of abandoning: 20240702 |